FILE - In this Saturday Oct. 10, 2009, file photo, a U.S. military helicopter, the CH-53E Super Stallion, airlifts humanitarian aid to be dropped in affected regions around Pariaman, north of Padang, Indonesia. On Tuesday, April 3, 2018, a CH-53E Super Stallion similar to the one shown went down shortly after 2:30 p.m., during a training mission near El Centro, Calif., a few miles from the U.S.-Mexico border. (AP Photo/Wong Maye-E, File)

4 presumed dead in California Marine helicopter crash

On Tuesday, a CH-53E Super Stallion went down shortly after 2:30 p.m., during a training mission near El Centro, Calif.

A Marine helicopter crashed during a Southern California training mission and all four crew members were believed killed, the military said.

The CH-53E Super Stallion went down shortly after 2:30 p.m. Tuesday near El Centro, a few miles from the U.S.-Mexico border.

The helicopter was with the 3rd Marine Aircraft Wing out of the Miramar air station in San Diego, according to a base press statement.

The nearby Naval Air Facility El Centro messaged that the crash site was north of Plaster City, west of El Centro.

The cause of the crash is under investigation.

The names of the crewmembers will be withheld until 24 hours after their relatives are notified, the Miramar base said.

Tuesday’s California crash is the deadliest involving a Marine aircraft since a KC130T transport plane went down in Mississippi last July, killing 15 Marines and a sailor.

The California crash also occurred on the same day that a Marine Harrier jet crashed during takeoff from an airport in the East African nation of Djibouti. The pilot managed to eject and was being medically evaluated, military officials said.